A mysterious UFO was captured on film by stunned onlookers across China on Thursday evening, in what appears to be the result of some high-altitude aircraft activity.

Residents of Beijing, Shanxi province and Inner Mongolia posted their reported ‘sightings’ of the unusual flight pattern on Chinese social media on October 11.

Photos and videos of the captivating spiral effect left in the wake of the unknown craft have been shared far and wide across Weibo, a popular social media platform in China.

ET has phoned home! UFO sightings were reportedly witnessed around China, including in Beijing, Inner Mongolia, and Shaanxi on Oct. 11. Experts say the sightings are most likely tracks left in the sky by high-altitude aircraft, as similar cases occurred in April. pic.twitter.com/RrpYL7T6WB

Chemtrails, contrails or clandestine spacecraft testing, no one can say for sure - but the visuals are nice at least.

Some speculated online that it may have been the failed Soyuz mission carrying Roscosmos and NASA astronauts to the ISS, but that took place at 4:40pm China Standard Time Thursday, and the UFO sightings weren’t reported until around 7pm local time.